// Generated by CoffeeScript 1.3.3
var __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
  __hasProp = {}.hasOwnProperty,
  __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

Annotator.Plugin.Filter = (function(_super) {

  __extends(Filter, _super);

  Filter.prototype.events = {
    ".annotator-filter-property input focus": "_onFilterFocus",
    ".annotator-filter-property input blur": "_onFilterBlur",
    ".annotator-filter-property input keyup": "_onFilterKeyup",
    ".annotator-filter-previous click": "_onPreviousClick",
    ".annotator-filter-next click": "_onNextClick",
    ".annotator-filter-clear click": "_onClearClick"
  };

  Filter.prototype.classes = {
    active: 'annotator-filter-active',
    hl: {
      hide: 'annotator-hl-filtered',
      active: 'annotator-hl-active'
    }
  };

  Filter.prototype.html = {
    element: "<div class=\"annotator-filter\">\n  <strong>" + Annotator._t('Navigate:') + "</strong>\n<span class=\"annotator-filter-navigation\">\n  <button class=\"annotator-filter-previous\">" + Annotator._t('Previous') + "</button>\n<button class=\"annotator-filter-next\">" + Annotator._t('Next') + "</button>\n</span>\n<strong>" + Annotator._t('Filter by:') + "</strong>\n</div>",
    filter: "<span class=\"annotator-filter-property\">\n  <label></label>\n  <input/>\n  <button class=\"annotator-filter-clear\">" + Annotator._t('Clear') + "</button>\n</span>"
  };

  Filter.prototype.options = {
    appendTo: 'body',
    filters: [],
    addAnnotationFilter: true,
    isFiltered: function(input, property) {
      var keyword, _i, _len, _ref;
      if (!(input && property)) {
        return false;
      }
      _ref = input.split(/\s*/);
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        keyword = _ref[_i];
        if (property.indexOf(keyword) === -1) {
          return false;
        }
      }
      return true;
    }
  };

  function Filter(element, options) {
    this._onPreviousClick = __bind(this._onPreviousClick, this);

    this._onNextClick = __bind(this._onNextClick, this);

    this._onFilterKeyup = __bind(this._onFilterKeyup, this);

    this._onFilterBlur = __bind(this._onFilterBlur, this);

    this._onFilterFocus = __bind(this._onFilterFocus, this);

    this.updateHighlights = __bind(this.updateHighlights, this);

    var _base;
    element = $(this.html.element).appendTo((options != null ? options.appendTo : void 0) || this.options.appendTo);
    Filter.__super__.constructor.call(this, element, options);
    (_base = this.options).filters || (_base.filters = []);
    this.filter = $(this.html.filter);
    this.filters = [];
    this.current = 0;
  }

  Filter.prototype.pluginInit = function() {
    var filter, _i, _len, _ref;
    _ref = this.options.filters;
    for (_i = 0, _len = _ref.length; _i < _len; _i++) {
      filter = _ref[_i];
      this.addFilter(filter);
    }
    this.updateHighlights();
    this._setupListeners()._insertSpacer();
    if (this.options.addAnnotationFilter === true) {
      return this.addFilter({
        label: Annotator._t('Annotation'),
        property: 'text'
      });
    }
  };

  Filter.prototype._insertSpacer = function() {
    var currentMargin, html;
    html = $('html');
    currentMargin = parseInt(html.css('padding-top'), 10) || 0;
    html.css('padding-top', currentMargin + this.element.outerHeight());
    return this;
  };

  Filter.prototype._setupListeners = function() {
    var event, events, _i, _len;
    events = ['annotationsLoaded', 'annotationCreated', 'annotationUpdated', 'annotationDeleted'];
    for (_i = 0, _len = events.length; _i < _len; _i++) {
      event = events[_i];
      this.annotator.subscribe(event, this.updateHighlights);
    }
    return this;
  };

  Filter.prototype.addFilter = function(options) {
    var f, filter;
    filter = $.extend({
      label: '',
      property: '',
      isFiltered: this.options.isFiltered
    }, options);
    if (!((function() {
      var _i, _len, _ref, _results;
      _ref = this.filters;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        f = _ref[_i];
        if (f.property === filter.property) {
          _results.push(f);
        }
      }
      return _results;
    }).call(this)).length) {
      filter.id = 'annotator-filter-' + filter.property;
      filter.annotations = [];
      filter.element = this.filter.clone().appendTo(this.element);
      filter.element.find('label').html(filter.label).attr('for', filter.id);
      filter.element.find('input').attr({
        id: filter.id,
        placeholder: Annotator._t('Filter by ') + filter.label + '\u2026'
      });
      filter.element.find('button').hide();
      filter.element.data('filter', filter);
      this.filters.push(filter);
    }
    return this;
  };

  Filter.prototype.updateFilter = function(filter) {
    var annotation, annotations, input, property, _i, _len, _ref;
    filter.annotations = [];
    this.updateHighlights();
    this.resetHighlights();
    input = $.trim(filter.element.find('input').val());
    if (input) {
      annotations = this.highlights.map(function() {
        return $(this).data('annotation');
      });
      _ref = $.makeArray(annotations);
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        annotation = _ref[_i];
        property = annotation[filter.property];
        if (filter.isFiltered(input, property)) {
          filter.annotations.push(annotation);
        }
      }
      return this.filterHighlights();
    }
  };

  Filter.prototype.updateHighlights = function() {
    this.highlights = this.annotator.element.find('.annotator-hl:visible');
    return this.filtered = this.highlights.not(this.classes.hl.hide);
  };

  Filter.prototype.filterHighlights = function() {
    var activeFilters, annotation, annotations, filtered, highlights, index, uniques, _i, _len, _ref;
    activeFilters = $.grep(this.filters, function(filter) {
      return !!filter.annotations.length;
    });
    filtered = ((_ref = activeFilters[0]) != null ? _ref.annotations : void 0) || [];
    if (activeFilters.length > 1) {
      annotations = [];
      $.each(activeFilters, function() {
        return $.merge(annotations, this.annotations);
      });
      uniques = [];
      filtered = [];
      $.each(annotations, function() {
        if ($.inArray(this, uniques) === -1) {
          return uniques.push(this);
        } else {
          return filtered.push(this);
        }
      });
    }
    highlights = this.highlights;
    for (index = _i = 0, _len = filtered.length; _i < _len; index = ++_i) {
      annotation = filtered[index];
      highlights = highlights.not(annotation.highlights);
    }
    highlights.addClass(this.classes.hl.hide);
    this.filtered = this.highlights.not(this.classes.hl.hide);
    return this;
  };

  Filter.prototype.resetHighlights = function() {
    this.highlights.removeClass(this.classes.hl.hide);
    this.filtered = this.highlights;
    return this;
  };

  Filter.prototype._onFilterFocus = function(event) {
    var input;
    input = $(event.target);
    input.parent().addClass(this.classes.active);
    return input.next('button').show();
  };

  Filter.prototype._onFilterBlur = function(event) {
    var input;
    if (!event.target.value) {
      input = $(event.target);
      input.parent().removeClass(this.classes.active);
      return input.next('button').hide();
    }
  };

  Filter.prototype._onFilterKeyup = function(event) {
    var filter;
    filter = $(event.target).parent().data('filter');
    if (filter) {
      return this.updateFilter(filter);
    }
  };

  Filter.prototype._findNextHighlight = function(previous) {
    var active, annotation, current, index, next, offset, operator, resetOffset;
    if (!this.highlights.length) {
      return this;
    }
    offset = previous ? 0 : -1;
    resetOffset = previous ? -1 : 0;
    operator = previous ? 'lt' : 'gt';
    active = this.highlights.not('.' + this.classes.hl.hide);
    current = active.filter('.' + this.classes.hl.active);
    if (!current.length) {
      current = active.eq(offset);
    }
    annotation = current.data('annotation');
    index = active.index(current[0]);
    next = active.filter(":" + operator + "(" + index + ")").not(annotation.highlights).eq(resetOffset);
    if (!next.length) {
      next = active.eq(resetOffset);
    }
    return this._scrollToHighlight(next.data('annotation').highlights);
  };

  Filter.prototype._onNextClick = function(event) {
    return this._findNextHighlight();
  };

  Filter.prototype._onPreviousClick = function(event) {
    return this._findNextHighlight(true);
  };

  Filter.prototype._scrollToHighlight = function(highlight) {
    highlight = $(highlight);
    this.highlights.removeClass(this.classes.hl.active);
    highlight.addClass(this.classes.hl.active);
    return $('html, body').animate({
      scrollTop: highlight.offset().top - (this.element.height() + 20)
    }, 150);
  };

  Filter.prototype._onClearClick = function(event) {
    return $(event.target).prev('input').val('').keyup().blur();
  };

  return Filter;

})(Annotator.Plugin);